Log Message:
Update databases/mongo-c-driver to 1.6.3.

mongo-c-driver 1.6.3
- mongoc_client_pool_t did not apply all TLS options to pooled connections
- SNI wasn't provided when allow_invalid_hostname is set

mongo-c-driver 1.6.2
- This release further improves HP-UX compatibility, especially when building
  with CMake, adds missing Windows SSPI files to the distribution tarball, and
  fixes distribution issues we introduced when porting the documentation from
  Mallard to Sphinx.

mongo-c-driver 1.6.1
- Correct the rules to parse localThresholdMS option from the MongoDB URI.
- Prevent crash in mongoc_cursor_destroy if "query" or \ 
"filter" are invalid.
- Include a file, mongoc-cluster-sspi.c, that had been omitted from the
  release archive.
- Fix logic bugs in mongoc_bulk_operation_t validation code.

mongo-c-driver 1.6.0
- Enterprise authentication on Windows now uses the native GSSAPI library;
  Cyrus SASL is no longer required for enterprise auth on Windows.
- BSON documents are more thoroughly validated before insert or update.
- New function mongoc_uri_set_mechanism_properties to replace all the
  authMechanismProperties on an existing URI.
- mongoc_uri_get_mechanism_properties asserts its inputs are not NULL.
- For consistency with other MongoDB drivers, mongoc_collection_save is
  deprecated in favor of mongoc_collection_insert or mongoc_collection_update.
- The driver is now built and continuously tested with MinGW-W64 on Windows.
- Experimental support for HPUX.
- The correct operation ids are now passed to Command Monitoring callbacks.
- Fix a crash if the driver couldn't connect to the server to create an index.
- The documentation is ported from Mallard XML to ReStructured Text, the
  HTML documentation is restyled, and numerous man page syntax errors fixed.
- Getter functions for options in mongoc_find_and_modify_opts_t:
  * mongoc_find_and_modify_opts_get_bypass_document_validation
  * mongoc_find_and_modify_opts_get_fields
  * mongoc_find_and_modify_opts_get_flags
  * mongoc_find_and_modify_opts_get_max_time_ms
  * mongoc_find_and_modify_opts_get_sort
  * mongoc_find_and_modify_opts_get_update
- All public functions now have the __cdecl calling convention on Windows.

mongo-c-driver 1.5.5
- This release fixes bugs parsing the localThresholdMS option from the MongoDB
  URI, and a crash in mongoc_cursor_destroy if "query" or \ 
"filter" are
  invalid.

mongo-c-driver 1.5.4
- This release fixes an error in cursor iteration when a readConcern is set.